How to set braces and brackets

Choose Page from the Display menu. Click on the Braces button to select
the Braces dialog.

Now you can set up the brace and bracket style that you want for your
piece. Select the tracks you want to connect with a given brace type (either
a bracket, a curly brace or a line) by dragging over the numbers for these
tracks in the Track box with the mouse. The tracks you have selected will
be highlighted. Now choose a brace type by clicking on Bracket, Curly
Brace, or Line in the Brace Type box. The tracks you selected will now
be connected together in the brace display window. You can continue connecting
tracks with different types of braces until you are happy with the brace
and bracket style for your piece.